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Nonoscillation theory of elliptic equations of order 2n
1976
Pacific Journal of Mathematics
Several nonoscillation theorems are obtained for elliptic equations of order In. These results extend several well known nonoscillation theorems for elliptic equations of order 2 and 4, and for ordinary differential equations of higher order. Introduction. Several authors have considered the problem of establishing oscillation and nonoscillation criteria for elliptic equations. We refer the reader to the books by C. A. Swanson [15] and K. Kreith [8] where extensive bibliographies can be found.
doi:10.2140/pjm.1976.64.1
fatcat:6a7qq76uhrhtlbm25mwsqtzkfe